Steps to reproduce: 1. Open Nightly with a clean profile and see that "Open multiple links" pref is disabled 2. Go to Tools -> New Guest Session 3. Go to Settings -> Customize ("Open multiple links" pref is disabled) 4. Enable it 5. Exit Guest Session 6. Go to Settings -> Customize Actual results: - "Open multiple links" is enabled Expected results: - Changing the pref state in Guest Mode shouldn't change the preference state in normal browsing Note: - for example if I have "show search suggestions" disabled in normal browsing, enter guest mode, the pref is disabled, but if I enabled it, returning to normal browsing the pref remains disabled.
This is known, because almost all the Settings use the "application" level shared preferences system. I think Martyn filed a bug about that.
I hadn't, but I just did! Bug 1162509
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